perplexed GRE

I am perplexed to know what to do.

做才好。

The farmer felt the cow,went away,returned,sorely perplexed,always afraid of being cheated.

那农民摸摸那头牛,走了又回来,犹豫决,总怕上当受骗。

The professor is never at a nonplus, and never perplexed by a problem.

那位教授从来会感到困惑，也会被任何问题所难倒。

He was still more perplexed, for this inconsequent smile made nothing clear.

他依然更加感到困惑，因为这突如其来的一笑，使他感到莫名其妙。

He perplexed me with this problem.

他用这个问题难住了。

Gary looked rather perplexed.

加里看起来相当困惑。